Issue with v1.19.0 - Telegraf failing to start

[veenaypatil]

Relevant telegraf.conf:

[[inputs.statsd]]
  service_address = ":8125"
  protocol = "udp"
  percentiles = [ 90 ]
  delete_gauges = true
  delete_timings = true
  delete_counters = true
  parse_data_dog_tags = true
  max_tcp_connections = 250
  delete_sets = true
  allowed_pending_messages = 10000
  percentile_limit = 1000
  metric_separator = "."

System info:

Telegraf Version : 1.19.0 Operating System: Linux

Steps to reproduce:

1. Starting Telegraf results in

   telegraf.service: Unit entered failed state.
   telegraf.service: Failed with result 'exit-code'.
   telegraf.service: Service hold-off time over, scheduling restart.
   Stopped The plugin-driven server agent for reporting metrics into InfluxDB.
   telegraf.service: Start request repeated too quickly.
   Failed to start The plugin-driven server agent for reporting metrics into InfluxDB.

2. Run telegraf -test

   telegraf --test
   2021-07-05T07:13:43Z I! Starting Telegraf 1.19.0
   2021-07-05T07:13:43Z I! Using config file: /etc/telegraf/telegraf.conf
   2021-07-05T07:13:43Z E! [telegraf] Error running agent: Error loading config file /etc/telegraf/telegraf.conf: error parsing statsd, line 129: (statsd.Statsd.Percentiles) cannot unmarshal TOML integer into float64

Expected behavior:

Expected Telegraf to be in running state as there was no change in the configs

Actual behavior:

It failed with the errors discussed above

Additional info:

Workaround we found is to Change the config percentiles = [ 90 ] to percentiles = [ 90.0 ] and restart Telegraf, it starts successfully

[srebhan]

Duplicate of #9441.